Charak Samhita
वमने तु विरेकः स्याद्विरेके वमनं पुनः । परिषेकावगाहाद्यैः सुशीतैः स्तम्भयेच्च तत्॥४७॥
If ati-yoga happens like this during attempting vamana, the residual doshas are eliminated by initiating a virechana and vice-versa. The following remedies need to be instituted fast for stambhana (To check the supra-optimal purificatory effect of therapy).
english translation
vamane tu virekaH syAdvireke vamanaM punaH । pariSekAvagAhAdyaiH suzItaiH stambhayecca tat॥47॥
hk transliteration by Sanscript